Kinematics of faint white dwarfs.

An analysis has been made for solar motion for 128 very faint white dwarfs of color class b or a. While about 40% of these stars may be high-velocity objects, it seems definitely indicated that the luminosity of all of them is considerably lower than that for the "normal" white dwarf of the same color.

The stars of low luminosity.

A search has been made among the faint stars with large proper motion found on the Palomar Survey plates for objects that, statistically-judging from their magnitude, color, and proper motion-would appear to be fainter than one ten-thousandth of the sun's luminosity. A total of 122 such objects have been found, and an analysis made for solar motion among them does, indeed, indicate that they must be of exceedingly low luminosity.

Stellar motion survey by automation.

The proper motion survey on plates taken with the 48-inch Schmidt telescope at Mount Palomar Observatory has now progressed to the point where some 250,000 new motions for faint stars have been measured, and 5,000 new white dwarfs and degenerate stars and 3,000 stars of low luminosity have been added.

Performance of an automated computerized plate scanner.

A brief summary is given of the initial performance of an automated computerized plate-measuring machine, and it is seen that the machine is working entirely satisfactorily.